How many GCSEs will your daughter actually get to choose?
For my DD she was only able to freely choose 2 options. I understand your frustration at the situation, and I also offered my DD the opportunity to switch schools in Year 9 to give her more freedom, but it's not unusual, it's just a case of different schools choosing different compulsory options.
You can say virtually any GCSE subject outside of English and Maths is irrelevant depending on your child's interests and aspirations. I don't think for one minute, for instance that my DD is ever going to find a use for being able to calculate the gravitational potential energy of football, but shit happens and that's the box she has to tick because science is a compulsory subject.
I work in a secondary school and as frustrating as this stuff is from a parental POV I cannot even begin to describe the amount of thought and work that goes into designing the GCSE programmes offered, and don't even get me started on the timetabling...it takes our Deputy Head around 6 months to finalise it every year.
They don't put these parameters in to make life difficult for students or parents.
That said, you seem to be determined to dig your heels in on this one, despite various posters stating that in any schools there are limits to what options are available.
Citizenship GCSE is not a 'guaranteed A grade' for the non academic or those that can't be arsed. It's a GCSE with the same intrinsic value as any other subject at the end of the day, and it will be as beneficial or otherwise as the student taking the subject makes it.
The constant whining about Citizenship being and 'easy' and worthless subject is also pretty offensive. There are plenty of girls, including my DD, in her Citizenship class who are top set across the board with multiple A/A* predicted grades, who have chosen the subject with aspirations towards Oxbridge and a future career in politics or law.
For reference:
www.aqa.org.uk/subjects/citizenship/gcse/citizenship-studies-8100